PRODUCT
Oil immersed on load tap changer transformer
Oil-immersed Transformer
Full Technical Parameters (Standard Version)
1. General Data
– Type: Oil-immersed, hermetically sealed / conservator type – Phase: 3-phase
– Frequency: 50 Hz / 60 Hz – Rated Voltage (HV): 6 kV, 10 kV, 11 kV, 13.2 kV, 13.8 kV
– Rated Voltage (LV): 0.4 kV (400/230 V) – Connection Group: Dyn11 (standard)
– Cooling Method: ONAN (Oil Natural Air Natural) – Insulation Class: A / F
– Service Conditions: Indoor / Outdoor
2. Rated Capacity Range
100, 200, 315, 400, 500, 630, 800, 1000, 1250, 1600, 2000, 2500, 3150, 4000,5000 kVA
3. Voltage & Taps
– HV Tap Changer: Off-circuit tap changer (no-load) – Tap Range: ±2×2.5% or ±5%
– Voltage Regulation Accuracy: ±0.5%
4. Losses (Typical Values)
– No-load Loss (P₀): Low loss / Amorphous core available – Load Loss (Pₖ): Complies with IEC & GB/T standard
– Total Loss: Optimized for energy efficiency
5. Impedance Voltage
– Short-circuit Impedance: – ≤1000 kVA: 4.0%
– ≥1250 kVA: 4.5% or 6.0% (as requested)
6. Insulation Level
– HV: 12/28/75 kV (for 10kV class) – LV: ≤3 kV
7. Temperature Rise
– Winding: 65 K – Top Oil: 60 K
– Ambient Temperature: -25°C ~ +40°C
8. Oil Tank & Structure
– Tank Material: Steel plate, welded, corrosion-resistant – Oil Type: Transformer oil (25# / 45#)
– Sealing Type: Fully sealed / Conservator with breather – Corrosion Protection: Sandblasting + epoxy primer + topcoat
9. Accessories (Standard)
– Oil level indicator – Pressure relief valve
– Thermometer pocket – Earthing bolt
– HV / LV bushing – Lifting lugs
– Nameplate
10. Standards Compliance
– IEC 60076 – GB 1094
– GB/T 6451 – GB 20052 (Energy efficiency)
11. Protection Class
– IP00 (open type) – IP20 (with enclosure)
Application Scope:0
Oil immersed on load tap changers can be widely used in hub substations, urban and rural power grid upgrades, steel plant arc furnaces, steel rolling and hot rolling production lines, open-pit mine electric shovels, underground drainage/lifting systems, centralized photovoltaic power stations, wind farm grid connected boosting stations, subway traction substations, high-speed railway distribution stations, chemical park compressor stations, cement production line kiln systems.
Application Scope of Oil-immersed Transformers
Oil-immersed transformers are widely used in all links of the power system due to their excellent insulation performance, strong heat dissipation capacity, high overload capability, and relatively low cost, making them core equipment for power transmission and distribution.
1. Power Grid Backbone
– Transmission Sector: Used in high/extra-high voltage substations (110kV, 220kV and above) to convert power between different voltage levels, serving as key equipment for long-distance power transmission.
– Distribution Sector: In medium-voltage distribution networks (35kV, 10kV, 6kV, etc.), they step down high-voltage power to 0.4kV (380/220V) to supply end-users.
2. Industry & Manufacturing
– Heavy Industry: Steel, metallurgy, chemical, petroleum, mining, and other sectors, providing stable power for large production equipment, motors, furnaces, etc.
– Light Industry: Textile, food processing, electronics manufacturing, and other factories for in-plant power distribution and equipment supply.
– Special Conditions: Explosion-proof or flame-retardant transformer oil can be selected for sites with explosion or fire protection requirements.
3. Urban & Commercial Buildings
– Urban Power Grid: Serving as the main power supply for residential communities, office buildings, shopping malls, hospitals, schools, and other public buildings, often installed in box-type substations or dedicated distribution rooms.
– Commercial Complexes: Powering large supermarkets, hotels, data centers, and cold chain logistics facilities to ensure reliable operation of critical loads.
4. Infrastructure & Public Utilities
– Transportation: Rail transit (subways, light rails), airports, high-speed rail stations, and ports for traction power and auxiliary systems.
– Public Services: Water supply/drainage pump stations, sewage treatment plants, street lighting, and communication base stations.
5. New Energy & Renewable Energy
– Wind & Solar Power: Step-up transformers for wind farms and photovoltaic power stations, connecting generated power to the grid.
– Energy Storage & EV Charging: Centralized power supply transformers for energy storage stations and electric vehicle charging piles.
6. Special Applications
– Mining & Offshore: Explosion-proof and corrosion-resistant models for underground mines and offshore platforms.
– Temporary Power: Mobile substation transformers for construction sites, disaster relief, and emergency power supply.
